Query：
学者姓名：王云新
Refining：
Year
Type
Indexed by
Source
Complex
Former Name
Co-Author
Language
Clean All
Abstract ：
太赫兹波作为一种穿透性强、具有非电离性和惧水性的电磁波，可以穿透多种非金属、非极性介质材料。太赫兹计算层析成像技术基于傅里叶中心切片定理和直线传播模型，通过记录不同投影角度下的强度数据，采用滤波反投影等重建算法获得样品三维吸收系数分布和内外部结构信息分布。随着太赫兹成像器件的不断发展和应用场景的拓展，已发展出多种照明模式、成像光路和重建算法，并已在文物保护、骨密度测量和无损检测领域开展了应用探索。概述太赫兹计算层析技术的基本原理，并从提高重建质量、分辨率和采集效率三方面具体介绍太赫兹计算层析成像技术的最新研究。
Keyword ：
照明光场调控 照明光场调控 三维成像 三维成像 太赫兹成像 太赫兹成像 计算层析 计算层析
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 戎路 , 刘乂铭 , 宁冉 et al. 太赫兹计算层析成像研究进展（特邀） [J]. | 激光与光电子学进展 , 2024 , 61 (02) : 207-224 . |
| MLA | 戎路 et al. "太赫兹计算层析成像研究进展（特邀）" . | 激光与光电子学进展 61 . 02 (2024) : 207-224 . |
| APA | 戎路 , 刘乂铭 , 宁冉 , 赵洁 , 王云新 , 王大勇 . 太赫兹计算层析成像研究进展（特邀） . | 激光与光电子学进展 , 2024 , 61 (02) , 207-224 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
A photonic-assisted reconfigurable LO harmonic downconverter with simultaneous image-rejection and RF self-interference cancellation (SIC) for in-band full-duplex communication is proposed and experimentally investigated based on a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM). The received signal from the antenna, which includes the radio frequency (RF) signal, image signal (IM) and self-interference (SI) signal, is input into one sub-MZM of the X-DPMZM. The self-reference (SR) signal is input into the other. The Y-DPMZM is used to load the LO signal and is properly biased to obtain the high-order sideband of the LO signal, which was then set as the LO signal of the reconfigurable harmonic frequency downconverter. By matching the power and delay of the SR signal and changing the main bias of the X-DPMZM, the SI signal can be eliminated directly in optical domain. With power splitting after the output of the DP-DPMZM, the quadrature IF signals can be obtained by a photonics-based continuously adjustable phase shifter. Then, photonics image-rejection down-conversion based on phase cancellation is realized after a low-frequency electrical 90 & DEG; hybrid coupler (HC) combines the quadrature IF signals. Both theoretical and experimental investigations are performed. The results show that the SIC has a cancellation depth more than 32 dB for the 10-MHz bandwidth and greater than 19 dB for the 500-MHz bandwidth, the image-rejection has an image-rejection ratio larger than 31 dB for 10-MHz bandwidth and larger than 22 dB for the 100-MHz bandwidth, both in 2(nd)- and 3(rd)-order harmonic down-conversion mode. Experiments are also carried out on the reconfigurable LO harmonic downconverter with simultaneous SIC and image-rejection. A 16-quadrature amplitude modulation (16-QAM) -modulated RF signal is successfully down-converted to a 1-GHz intermediate frequency (IF) signal with self-interference and image frequency cancelled. It is verified that the RF signal can be well recovered from SI and IM signals by the proposed system.
Keyword ：
microwave photonics microwave photonics self-interference cancellation self-interference cancellation reconfigurable lo harmonic downconverter reconfigurable lo harmonic downconverter Image-rejection Image-rejection
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Yang, Dengcai , Wu, Fuzheng , Yang, Feng et al. Photonic-Assisted Reconfigurable LO Harmonic Downconverter With RF Self-Interference Cancellation and Image-Rejection [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2023 , 41 (1) : 149-158 . |
| MLA | Yang, Dengcai et al. "Photonic-Assisted Reconfigurable LO Harmonic Downconverter With RF Self-Interference Cancellation and Image-Rejection" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 41 . 1 (2023) : 149-158 . |
| APA | Yang, Dengcai , Wu, Fuzheng , Yang, Feng , Yin, Jing , Wang, Dayong , Wang, Yunxin et al. Photonic-Assisted Reconfigurable LO Harmonic Downconverter With RF Self-Interference Cancellation and Image-Rejection . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2023 , 41 (1) , 149-158 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
本发明公开了利用二维振镜扫描照明的的太赫兹全场相衬成像方法，该方法包括用二维振镜快速改变照明光束的位置，并使用探测器延时曝光对成像帧进行平均，从而得到一个强度分布均匀的部分相干照明光场。通过一个4f系统对物体成像，采集一幅像平面和两幅不同离焦面下的强度图像，用数值差分的方法得到轴向导数。将轴向导数带入到光强传输方程的迭代算法中，通过不断减小计算实验中的轴向导数与计算得到的轴向导数的差值，不断累加相位值。当迭代满足迭代收敛条件时，迭代结束最后得到像平面的相位分布。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 戎路 , 张宇哲 , 王大勇 et al. 一种利用二维振镜扫描照明的太赫兹全场相衬成像方法 : CN202310522907.3[P]. | 2023-05-10 . |
| MLA | 戎路 et al. "一种利用二维振镜扫描照明的太赫兹全场相衬成像方法" : CN202310522907.3. | 2023-05-10 . |
| APA | 戎路 , 张宇哲 , 王大勇 , 林述锋 , 赵洁 , 王云新 et al. 一种利用二维振镜扫描照明的太赫兹全场相衬成像方法 : CN202310522907.3. | 2023-05-10 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
本发明公开了一种基于太赫兹f‑θ物镜和二维扫描振镜的三维计算层析成像方法，包括优化设计太赫兹f‑θ物镜、三维计算层析的数据重建过程。设计适用于太赫兹计算层析成像系统的f‑θ物镜需要满足三个条件：不同角度θ的入射光束透射太赫兹f‑θ物镜之后在观察平面产生的像高H满足H＝f×θ，其中f为太赫兹f‑θ物镜的焦距；不同角度的入射光束经过太赫兹f‑θ物镜之后的出射光束平行于光轴传播；不同角度的入射光束经过太赫兹f‑θ物镜之后的出射光束尺寸基本不发生改变。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 王大勇 , 宁冉 , 戎路 et al. 一种基于太赫兹f-θ物镜和二维扫描振镜的三维计算层析成像方法 : CN202310522898.8[P]. | 2023-05-10 . |
| MLA | 王大勇 et al. "一种基于太赫兹f-θ物镜和二维扫描振镜的三维计算层析成像方法" : CN202310522898.8. | 2023-05-10 . |
| APA | 王大勇 , 宁冉 , 戎路 , 赵洁 , 王云新 , 林述锋 . 一种基于太赫兹f-θ物镜和二维扫描振镜的三维计算层析成像方法 : CN202310522898.8. | 2023-05-10 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
本发明公开了一种基于达曼光栅分束的连续太赫兹波单曝光叠层成像方法，该方法通过分束器件太赫兹达曼光栅产生对被测样品进行阵列照明的子波束，同时捕获多束携带被测样品信息的衍射图样，将衍射图样进行叠层重建算法重建出照明光束的复振幅和样品的透过率函数，得到被测样品的表面形貌，提取出被测样品的相位信息，从而定量推算出被塑料、陶瓷、纸张等非极性物质遮挡的被测样品表面的形貌结构。本发明有效解决了普通太赫兹叠层成像需要多次曝光，使得实时性较低的问题，从而在定量得到大样品的形貌结构的基础上，真正实现大视场高分辨率快速成像。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 戎路 , 林昊 , 王大勇 et al. 一种达曼光栅分束的单次曝光太赫兹叠层成像方法 : CN202310303301.0[P]. | 2023-03-26 . |
| MLA | 戎路 et al. "一种达曼光栅分束的单次曝光太赫兹叠层成像方法" : CN202310303301.0. | 2023-03-26 . |
| APA | 戎路 , 林昊 , 王大勇 , 赵洁 , 林述锋 , 王云新 . 一种达曼光栅分束的单次曝光太赫兹叠层成像方法 : CN202310303301.0. | 2023-03-26 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
一种基于微波光子技术的多目标三坐标探测方法属于微波光子与雷达相交叉领域。本发明将微波光子技术和雷达探测技术相结合，采用光子倍频手段产生宽带发射信号对目标进行探测，使用具有对称结构的十字形天线阵列接收回波并对回波进行去斜处理。对去斜处理得到的去斜信号频率进行对称性分析，实现对不同目标的距离、方位角以及俯仰角探测信息的区分，实现同时探测多目标的距离、方位角以及俯仰角信息。本发明对激光器功率波动和调制器偏置点漂移不敏感，因此具有更好的稳定性；接收天线的基线长度不必小于半波长，因此可以使用大孔径的接收天线阵列，以获得更高的探测精度；需波束扫描而可以实现对大方向范围内空间的实时监测。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 王云新 , 何铮 , 王大勇 et al. 一种基于微波光子技术的多目标三坐标探测方法 : CN202310638630.0[P]. | 2023-06-01 . |
| MLA | 王云新 et al. "一种基于微波光子技术的多目标三坐标探测方法" : CN202310638630.0. | 2023-06-01 . |
| APA | 王云新 , 何铮 , 王大勇 , 张钰 , 张静 , 赵洁 et al. 一种基于微波光子技术的多目标三坐标探测方法 : CN202310638630.0. | 2023-06-01 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
本发明提供了一种基于SLM多角度调制的单次曝光叠层成像方法。该方法包括设计相位图像加载到空间光调制器中来生成不同角度的子光束，探测器采集到的单幅衍射图样包含物面交叠的五幅不同的子衍射图案，由于相邻衍射图交叠部分包含有物体冗余信息，可以用叠层迭代算法得到探针光束的复振幅分布，通过衍射回传得到物平面的复振幅分布。通过拍摄一幅衍射图强度分布图像，用叠层迭代算法计算出中心平面的相位分布，进而通过衍射回传得到物平面的复振幅分布与探针分布。相比于其他叠层成像方法，单次曝光叠层成像速度更快、对时间分辨与光源的相干性要求更低。
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 王大勇 , 戎路 , 龙翔 et al. 一种基于SLM多角度调制的单次曝光叠层成像方法 : CN202310594630.5[P]. | 2023-05-25 . |
| MLA | 王大勇 et al. "一种基于SLM多角度调制的单次曝光叠层成像方法" : CN202310594630.5. | 2023-05-25 . |
| APA | 王大勇 , 戎路 , 龙翔 , 林述锋 , 赵洁 , 王云新 . 一种基于SLM多角度调制的单次曝光叠层成像方法 : CN202310594630.5. | 2023-05-25 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
The wavelength of terahertz wave is between those of infrared wave and microwave,with the characteristics of penetration,strong water absorption,and low photon energy,etc. Terahertz imaging has been are widely used in biomedical imaging,anti- terrorism security and non-destructive testing and other fields. The good penetration of terahertz wave is beneficial to detect the internal structure of objects. Phasecontrast imaging can better reflect the internal structure of objects,compared with simple terahertz intensity imaging. Continuous terahertz wave phase-contrast imaging can be divided into point- by- point scanning acquisition method with a single-point detector and full- field recording method with a surface array detector. The former has a low data acquisition rate and cannot image large samples quickly;the latter has a fast data acquisition rate,but also places higher demands on the detector's pixel size and dynamic range. Continuous terahertz wave digital holographic imaging records the hologram by a faceted detector,and then obtains the complex amplitude information of the sample by a reconstruction algorithm. According to different optical path structures,continuous terahertz wave digital holography can be divided into in- line digital holography and off- axis digital holography. In-line digital holography can make full use of the spatial bandwidth product of the detector,but requires a sufficiently high energy ratio of direct and diffracted light after passing through the sample, as well as the problem of twin image interference. Off-axis digital holography introduces a certain angle between the object light and the reference light,which solves the twin image problem and makes the reconstruction process simple.Off-axis image-plane digital holography uses a microscope objective to directly collect the imaging information of the object. Compared with off-axis Fresnel digital holography,this imaging method has fast computation and high resolution,and has been widely applied at visible wavelengths. Besides,this imaging method has been combined with some other high-resolution imaging techniques,resulting in multi- angle illumination digital holography, structured light illumination digital holography etc. However,due to the lack of terahertz devices and the strong absorption of terahertz by polar substances,the terahertz full- field phase-contrast imaging usually requires a compact and simple optical path structure. To the best of my knowledge,no relevant work on terahertz image-plane digital holography has been reported yet. In recent years,various terahertz devices such as lasers,detectors and gratings have been developed rapidly. New terahertz imaging elements such as large numerical aperture terahertz lenses and terahertz solid immersion objectives have emerged, providing strong hardware support for the development of terahertz imaging. In this paper,a continuous terahertz wave image-plane digital holographic imaging method based on TPX lens is proposed. The holographic recording and reproduction process is studied,and the quadratic phase distortion introduced by TPX lens is removed by surface fitting distortion correction. The digital holographic imaging system of terahertz image plane is built. The imaging resolution of the system is quantitatively analyzed by using an amplitude Siemens star sample. Then two phase samples of organic materials and biological samples are imaged. The experiment verifies the effectiveness of the phase contrast imaging method. The introduction of image plane imaging in terahertz band is conducive to improve the resolution and quality of terahertz imaging. It has a wide application prospect in biomedical imaging,nondestructive testing and other fields.
Keyword ：
Image-plane digital holography Image-plane digital holography Digital holography Digital holography Off-axis digital holography Off-axis digital holography Terahertz imaging Terahertz imaging Aberration correction Aberration correction
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang Yunxin , Zhu Jianglei , Zhao Jie et al. Continuous Terahertz Image-plane Digital Holography Based on TPX Lens [J]. | ACTA PHOTONICA SINICA , 2022 , 51 (4) . |
| MLA | Wang Yunxin et al. "Continuous Terahertz Image-plane Digital Holography Based on TPX Lens" . | ACTA PHOTONICA SINICA 51 . 4 (2022) . |
| APA | Wang Yunxin , Zhu Jianglei , Zhao Jie , Wang Dayong , Rong Lu , Lin Shufeng . Continuous Terahertz Image-plane Digital Holography Based on TPX Lens . | ACTA PHOTONICA SINICA , 2022 , 51 (4) . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
A photonics-assisted frequency conversion and self-interference cancellation approach is proposed and experimentally demonstrated for in-band full-duplex (IBFD) communication. Carrier suppressed single sidebands (CS-SSB) of the intermediate frequency (IF) signal and the local oscillator (LO) signal are simultaneously obtained through the X-DPMZM in a dual-polarization dual-parallel Mach-Zehnder (DP-DPMZM) modulator. A transmit signal with high purity is produced, and a shared LO optical sideband is also provided for the subsequent downconversion. The carrier suppressed double sideband (CS-DSB) modulation for the signal of interest (SOI) is achieved via the Y-DPMZM. The self-interference signal is suppressed by adjusting the bias voltage of its main MZM. An optical bandpass filter (OBPF) is combined to realize frequency downconversion. The experimental results show that the spurious-free dynamic range (SFDR3) is 102.6 dB/Hz(2/3) for frequency upconversion, a cancellation depth of more than 50 dB for single-frequency self-interference cancellation (SIC), and more than 22 dB for wideband SIC. The proposed link has superiority in multifunctionality, including in-band transmission, reception, and self-interference cancellation, with a shared LO.
Keyword ：
Frequency conversion Frequency conversion self-interference cancellation self-interference cancellation Interference cancellation Interference cancellation Optical polarization Optical polarization Silicon Silicon Optical modulation Optical modulation microwave photonics microwave photonics Microwave photonics Microwave photonics Microwave communication Microwave communication Optical filters Optical filters in-band full duplex com- munication in-band full duplex com- munication
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, Dayong , Li, Peihan , Wang, Yunxin et al. Photonics-Assisted Frequency Conversion and Self-Interference Cancellation for In-Band Full-Duplex Communication [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (3) : 607-614 . |
| MLA | Wang, Dayong et al. "Photonics-Assisted Frequency Conversion and Self-Interference Cancellation for In-Band Full-Duplex Communication" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 40 . 3 (2022) : 607-614 . |
| APA | Wang, Dayong , Li, Peihan , Wang, Yunxin , Li, Tao , Yang, Feng , Zhou, Tao et al. Photonics-Assisted Frequency Conversion and Self-Interference Cancellation for In-Band Full-Duplex Communication . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (3) , 607-614 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
A photonic multi-format background-free binarily modulated microwave signal generator using a single dual-polarization dual-parallel Mach-Zehnder modulator is proposed and demonstrated. The proposed generator features good reconfiguration and switchability. By simply adjusting the direct current biases of the modulator, amplitude shift keying (ASK), phase shift keying (PSK) and frequency-shift keying (FSK) microwave signals can be generated. Benefiting from the complementary intensity modulation, there is no residual baseband modulated signal in the generated binarily modulated signals. The system does not involve any optical or electrical filters, which ensures good tunability of the generator. By changing the frequency of the driven microwave carrier and bit rate of the electrical coded signal, the frequency and rate of the generated multi-format signals can be adjusted accordingly. The multi-format switchable signal generator has great potential in multi-functional communication and radar systems.
Keyword ：
Optical switches Optical switches frequency-shift keying frequency-shift keying signal generation signal generation Modulation Modulation Amplitude shift keying Amplitude shift keying Frequency shift keying Frequency shift keying Microwave photonics Microwave photonics Optical filters Optical filters background-free background-free Microwave filters Microwave filters phase shift keying phase shift keying
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhu, Sha , Chen, Zhijie , Wang, Yunxin et al. Single-modulator Based Multi-Format Switchable Signal Generator Without Background Noise [J]. | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (20) : 6693-6700 . |
| MLA | Zhu, Sha et al. "Single-modulator Based Multi-Format Switchable Signal Generator Without Background Noise" . | JOURNAL OF LIGHTWAVE TECHNOLOGY 40 . 20 (2022) : 6693-6700 . |
| APA | Zhu, Sha , Chen, Zhijie , Wang, Yunxin , Jin, Ya , Zhai, Kunpeng , Bai, Yunping et al. Single-modulator Based Multi-Format Switchable Signal Generator Without Background Noise . | JOURNAL OF LIGHTWAVE TECHNOLOGY , 2022 , 40 (20) , 6693-6700 . |
| Export to | NoteExpress RIS BibTex |
Export
| Results： |
Selected to |
| Format： |
